198837061 has 4 divisors (see below), whose sum is σ = 198873900. Its totient is φ = 198800224.

The previous prime is 198837059. The next prime is 198837091. The reversal of 198837061 is 160738891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172108161 + 26728900 = 13119^2 + 5170^2 .

It is a cyclic number.

It is not a de Polignac number, because 198837061 - 2¹ = 198837059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198836999 and 198837017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198837011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8566 + ... + 21703.

It is an arithmetic number, because the mean of its divisors is an integer number (49718475).

Almost surely, 2^198837061 is an apocalyptic number.

It is an amenable number.

198837061 is a deficient number, since it is larger than the sum of its proper divisors (36839).

198837061 is an equidigital number, since it uses as much as digits as its factorization.

198837061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36838.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 198837061 is about 14100.9595772770. The cubic root of 198837061 is about 583.6678588071.

The spelling of 198837061 in words is "one hundred ninety-eight million, eight hundred thirty-seven thousand, sixty-one".